This IC is a temperature switch IC that changes the IC output level from Low to High when the temperature
around the IC reaches the detection temperature. With the hysteresis function, IC output level returns to
Low when the ambient temperature drops to the hysteresis temperature selected after detection. Detection
temperature T
DET
can be selected in 1.0°C steps between the range of 60 to 90°C with rank expansion, with
detection temperature accuracy of ±2.0°C.
Features
1.
2.
3.
4.
5.
Low current consumption
Small package
High Temperature accuracy
Low power supply operation range
Comes with hysteresis function
Package
SSON-4B
Applications
1.
2.
3.
4.
5.
6.
Cellular phones
LCD TVs/panels
Game equipment
PCs
System thermal monitor
OA equipment
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
Temperature Switch IC with Hysteresis MM3488
Model Name
M
M
3
4
8
8
1
1
Hysteresis Temperature (T
HYS
)
A
T
HYS
=5.0°C
B
T
HYS
=10°C
C
T
HYS
=15°C
3
Package
SSON-4B
2
R
3
R
4
E
2
Detecitng Temperature (T
DET
)
60
T
DET
=+60°C
T
DET
is 1.0°C steps
90
T
DET
=+90°C
~
R
L
4
Packing Specifications
R HOUSING (Standard)
L HOUSING
R
Block Diagram
V
DD
Reference
Voltage Source
DET
Noise Rejection
Circuit
Temperature
Sensor
GND
Pin Assignment
4
3
1
2
3
4
DET
GND
NC
V
DD
1
2
SSON-4B
(TOP VIEW)
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
Temperature Switch IC with Hysteresis MM3488
Pin Description
Pin No.
Pin Name
Function
Internal Equivalent Circuit
1
1
DET
Temp. Detect Output Pin
GND
2
GND
Ground pin
3
3
NC (Note1)
NC (Testing pin)
GND
4
V
DD
Power supply pin
Note1 : Testing pin is connected with the internal circuit for testing.
When resistance and capacity are connected with Testing pin, this product produce improper operating
signals. Please set Testing pin to the open state.
Absolute Maximum Ratings
Item
Maximum Supply Voltage
Terminal Voltage
Storage Temperature
Power Dissipation
Symbol
V
DDmax
DET
max
T
stg
Pd
Ratings
−0.3~+6.0
−0.3~+6.0
−55~+125
150
Units
V
V
°C
mW
Recommended Operating Conditions
Item
Operating Supply Voltage
Operating Temperature
Symbol
V
DDopr
T
opr
Ratings
+1.6~+5.0
−30~+105
Units
V
°C
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
Temperature Switch IC with Hysteresis MM3488
Electrical Characteristics
Item
Operating Supply Voltage
Detecitng Temperature
Accuracy (Note2)
Hysteresis Temperature
(Note3)
(Except where noted otherwise Ta=25°C, V
DD
=1.8V)
Measurement conditions
T
DET
=60~90°C
V
DD
=1.6~3.3V
V
DD
=3.3~5.0V
T
HYS
=5.0°C
T
HYS
=10°C
T
HYS
=15°C
V
DET
=0.4V,
V
DET
=Low Level
V
DD
=5.0V,
V
DET
=High Level
1.5
Ta=+60~+90°C
R
PULL-UP
= 1MΩ
250
100
Min. Typ. Max. Units
1.6
−2.0
−1.5
2.5
7.0
10.5
4.0
1.8
0
+0.5
5.0
10.0
15.0
12.0
0.1
3.5
500
500
5.0
+2.0
+2.5
7.5
13.0
19.5
V
°C
°C
°C
°C
°C
mA
µA
µA
µs
µs
Symbol
V
DD
T
DETAC1
T
DETAC2
T
HYS
DET Sink Current
DET Leak Current
Supply Current
Noise Rejection Time
VDD Start-up Response
I
DETL
I
LEAK
I
DD
t
noise
t
vsr
Note2 : Detection temperature can be selected in 1.0°C steps (+60~+90°C)
Note3 : Hysteresis temperature can be selected in 5.0°C steps (5.0°C, 10°C, 15°C)
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
Temperature Switch IC with Hysteresis MM3488
Timing Chart
Detecting Temperature (T
DET
)
t
1
Ta (°C)
Hysteresis Temperature (T
HYST
)
t
Detection Release
Temperature
V
DD
(V)
90%
10%
t
DET (V)
t
VSR
t
noise
t
1
<t
noise
t
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
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